Tomorrow it's out...Microsoft Office 2010. I've been using the beta version since April to outline my novel in OneNotes, and it looks strong. My official disc should be arriving from Amazon.com within a day now. I particularly like that the information can be stored in the 'cloud', and be accessed from any computer. A sweet method for backup (like dropbox.com, only integrated in Office), if it works. $50 for Home and Student edition, per computer, which includes the online storage.
And for the writers out there, I have learned from online research that using Word to format a manuscript takes quite a bit of tweaking, and here's the article to show you how: http://daiya.mvps.org/bookwordframes.htm